Amide- and urea-substituted 8-hydroxyquinoline derivatives 3, 5, and 7 are prepared by standard methods. In the solid state 3a, 5d, and 7 form 8-hydroxyquinoline dimers with bifurcated inter- and intramolecularhydrogen bonds.
8-Hydroxyquinoline derivatives HL1 with urea moieties in the 7-position form hexa-stranded trinuclear coordination compounds with a helicate-type arrangement of the ligands; the chiral ligand HL2 stereoselectively produces P-[Zn3(L2)6].